Stage 2: Stage 2 will evaluate repeated intratumoral injections of HF10 at dose levels of 1 x 10^6 TCID50/dose and 1 x 10^7 TCID50/dose. Three patients will be enrolled in each of the repeated dose cohorts. In Stage 2, the first patient treated in each repeated dose cohort must be seropositive for HSV-1. Patients in the repeated dose cohort will receive a total of four intratumoral injections in the same lesion.